You can return to work immediately after sclerotherapy. There is no down time. I do recommend to my sclerotherapy patients that they refrain from intense exercise, saunas, and hot tubs for 2 days. Walking and being active is encouraged. You do not need to avoid normal sun exposure, just wear sunscreen, and for the first few weeks don’t do any intense sun tanning. Legs don’t really need to heal after sclerotherapy. But patience is required. Spider veins don’t instantly disappear. In fact, they can look darker for several weeks before they start to fade away.